[PATCH] Btrfs-progs: add options to change size in logical to inode transition

[Liu Bo]

Add an option 's' to set size in logical to inode transition, then we are able
to read all the refs to the logical address.

Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
 cmds-inspect.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/cmds-inspect.c b/cmds-inspect.c
index 2f0228f..be5e588 100644
--- a/cmds-inspect.c
+++ b/cmds-inspect.c
@@ -115,7 +115,7 @@ static int cmd_inode_resolve(int argc, char **argv)
 }
 
 static const char * const cmd_logical_resolve_usage[] = {
-       "btrfs inspect-internal logical-resolve [-Pv] <logical> <path>",
+       "btrfs inspect-internal logical-resolve [-Pv] [-s size] <logical> 
<path>",
        "Get file system paths for the given logical address",
        NULL
 };
@@ -130,12 +130,13 @@ static int cmd_logical_resolve(int argc, char **argv)
        int bytes_left;
        struct btrfs_ioctl_logical_ino_args loi;
        struct btrfs_data_container *inodes;
+       u64 size = 4096;
        char full_path[4096];
        char *path_ptr;
 
        optind = 1;
        while (1) {
-               int c = getopt(argc, argv, "Pv");
+               int c = getopt(argc, argv, "Pvs:");
                if (c < 0)
                        break;
 
@@ -146,6 +147,9 @@ static int cmd_logical_resolve(int argc, char **argv)
                case 'v':
                        verbose = 1;
                        break;
+               case 's':
+                       size = atoll(optarg);
+                       break;
                default:
                        usage(cmd_logical_resolve_usage);
                }
@@ -154,12 +158,13 @@ static int cmd_logical_resolve(int argc, char **argv)
        if (check_argc_exact(argc - optind, 2))
                usage(cmd_logical_resolve_usage);
 
-       inodes = malloc(4096);
+       size = max(size, 4096);
+       inodes = malloc(size);
        if (!inodes)
                return 1;
 
        loi.logical = atoll(argv[optind]);
-       loi.size = 4096;
+       loi.size = size;
        loi.inodes = (u64)inodes;
 
        fd = open_file_or_dir(argv[optind+1]);
@@ -176,8 +181,9 @@ static int cmd_logical_resolve(int argc, char **argv)
        }
 
        if (verbose)
-               printf("ioctl ret=%d, bytes_left=%lu, bytes_missing=%lu, "
-                       "cnt=%d, missed=%d\n", ret,
+               printf("ioctl ret=%d, total_size=%llu, bytes_left=%lu, "
+                       "bytes_missing=%lu, cnt=%d, missed=%d\n",
+                       ret, size,
                        (unsigned long)inodes->bytes_left,
                        (unsigned long)inodes->bytes_missing,
                        inodes->elem_cnt, inodes->elem_missed);
-- 
1.7.7.6

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